Hand made and hand glazed so that each Campania Tevere Jar is unique means yours will be a one-of-a-kind prize for the garden. The terra cotta pottery is high fired at 990 degrees centigrade and the glaze at 1000 degrees centigrade to ensure durability and frost-resistance. Each piece is subjected to rigorous testing in freeze-thaw conditions to ensure quality. Due to the processes used in the manufacturing of this hand-made and hand-glazed container, all variations with respect to firing, color, size, and crackling are not deemed natural occurrences in the manufacturing process and should not be considered defects. The glaze consists of natural, non-chemical components. Final colors may vary slightly from one jar to another.